Castaldo® Super High Strength Silicone Molding Rubber: 2 7/8" - 18" Strips - 5lb Box

These 5 lb boxes of 2-7/8 inch strips are made from Castaldo’s strongest vulcanizable rubber formula. It is specifically designed to resist tearing, even when used for jewelry designs with extreme undercuts or sharp, thin edges. The high-strength properties ensure that the mold parting lines stay crisp and clean over hundreds of uses. For any design that is "difficult to mold," these super hi-strength strips are the professional’s primary recommendation.